drm/i915/bdw: Implement edp PSR workarounds
This implements a workaround for PSR dealing with some vblank issue.
WaPsrDPAMaskVBlankInSRD && WaPsrDPRSUnmaskVBlankInSRD
v2: forgot to git add bogus whitespace fix
v3: Update with workaround names.
Use for_each_pipe() and CHICKEN_PIPESL_1(pipe) macro (Ville)
Cc: Art Runyan <arthur.j.runyan@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuosugeek.org>
[danvet: Kill redundant IS_BDW check and remove the copious amount of
uneeded lines added.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index a35ebcf..6d18675 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5277,6 +5277,7 @@
static void gen8_init_clock_gating(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
+ enum pipe i;
I915_WRITE(WM3_LP_ILK, 0);
I915_WRITE(WM2_LP_ILK, 0);
@@ -5287,6 +5288,17 @@
/* WaSwitchSolVfFArbitrationPriority */
I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
+
+ /* WaPsrDPAMaskVBlankInSRD */
+ I915_WRITE(CHICKEN_PAR1_1,
+ I915_READ(CHICKEN_PAR1_1) | DPA_MASK_VBLANK_SRD);
+
+ /* WaPsrDPRSUnmaskVBlankInSRD */
+ for_each_pipe(i) {
+ I915_WRITE(CHICKEN_PIPESL_1(i),
+ I915_READ(CHICKEN_PIPESL_1(i) |
+ DPRS_MASK_VBLANK_SRD));
+ }
}
static void haswell_init_clock_gating(struct drm_device *dev)